HI IN NGC 2903 AND ITS ENVIRONMENT
--- A project to make the deepest, most thorough HI map of another galaxy and its environment
This Project is now completed. Please see at published paper.
The NGC 2903 Team
The NGC 2903 project began as a pilot project for single beam mapping of this nearby galaxy using the Arecibo telescope. With the advent of the new ALFA focal plane array, it was important to consider how its power could be used in the study of HI in and around galaxies. Are there extended HI disks? Are there small HI clouds or companions that hadn't yet been detected? If so, what are their spatial and mass distributions like? What is the relationship between HI disks and the more distant Lyman alpha systems? Is it possible to see declining rotation curves in faint outer HI emission? The answers to these questions require very deep observations using a sensitive radio telescope. Our first single beam observations (program ID A1802) received observing time in early 2004 as a first step towards answering these questions. With the installation of the ALFA array the same year, this provided a new window of oppportunity to extend the first observations, using the full power of this instrument. Thus began the ALFA Precursor Project (program ID A1963) to fully map NGC 2903 and its environment. Ultimately, the project received approximately 100 hours of which a substantial fraction was used to map the beams as accurately as possible. Our final maps etc. are available below.
The Project
Single Beam Project (A1802)
A1963 Observing Proposal & Time Allocation
ALFA Observing Page (A1963)
Results
A1963 ALFA GALAXY & BEAM RESULTS
AIPS_Software Download: SUMZE,SUMWT
XSMC
IDL_Software Download:
mbmclean.pro
Complementary and Archival Data Reduced VLA Archival Data
Parkes HIPASS Data
Other Helpful Information on NGC 2903 
NEDLiterature on NGC 2903
Amateur Image(s)
Last revised Feb. 25, 2009
Judith A. Irwin
Office: Rm 308E Stirling Hall
TEL: (613) 533-2717/2707
FAX: (613) 533-6463
Email: IRWIN@ASTRO.QUEENSU.CA